[831] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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[850] | 27 | // $Id: G4ReplicaNavigation.cc,v 1.19 2008/04/28 15:39:55 gcosmo Exp $ |
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| 28 | // GEANT4 tag $Name: HEAD $ |
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[831] | 29 | // |
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| 30 | // |
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| 31 | // class G4ReplicaNavigation Implementation |
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| 32 | // |
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| 33 | // Author: P.Kent, 1996 |
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| 34 | // |
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| 35 | // -------------------------------------------------------------------- |
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| 36 | |
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| 37 | #include "G4ReplicaNavigation.hh" |
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| 38 | |
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| 39 | #include "G4AffineTransform.hh" |
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| 40 | #include "G4SmartVoxelProxy.hh" |
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| 41 | #include "G4SmartVoxelNode.hh" |
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| 42 | #include "G4VSolid.hh" |
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| 43 | #include "G4GeometryTolerance.hh" |
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| 44 | |
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| 45 | #include <assert.h> |
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| 46 | |
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| 47 | // ******************************************************************** |
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| 48 | // Constructor |
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| 49 | // ******************************************************************** |
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| 50 | // |
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| 51 | G4ReplicaNavigation::G4ReplicaNavigation() |
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| 52 | : fCheck(false), fVerbose(0) |
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| 53 | { |
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| 54 | kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance(); |
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| 55 | kRadTolerance = G4GeometryTolerance::GetInstance()->GetRadialTolerance(); |
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| 56 | kAngTolerance = G4GeometryTolerance::GetInstance()->GetAngularTolerance(); |
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| 57 | } |
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| 58 | |
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| 59 | // ******************************************************************** |
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| 60 | // Destructor |
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| 61 | // ******************************************************************** |
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| 62 | // |
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| 63 | G4ReplicaNavigation::~G4ReplicaNavigation() |
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| 64 | { |
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| 65 | } |
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| 66 | |
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| 67 | // ******************************************************************** |
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| 68 | // Inside |
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| 69 | // ******************************************************************** |
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| 70 | // |
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| 71 | EInside |
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| 72 | G4ReplicaNavigation::Inside(const G4VPhysicalVolume *pVol, |
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| 73 | const G4int replicaNo, |
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| 74 | const G4ThreeVector &localPoint) const |
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| 75 | { |
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| 76 | EInside in = kOutside; |
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| 77 | |
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| 78 | // Replication data |
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| 79 | // |
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| 80 | EAxis axis; |
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| 81 | G4int nReplicas; |
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| 82 | G4double width, offset; |
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| 83 | G4bool consuming; |
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| 84 | |
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| 85 | G4double coord, rad2, rmin, tolRMax2, rmax, tolRMin2; |
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| 86 | |
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| 87 | pVol->GetReplicationData(axis, nReplicas, width, offset, consuming); |
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| 88 | assert(consuming); |
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| 89 | |
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| 90 | switch (axis) |
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| 91 | { |
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| 92 | case kXAxis: |
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| 93 | case kYAxis: |
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| 94 | case kZAxis: |
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| 95 | coord = std::fabs(localPoint(axis))-width*0.5; |
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| 96 | if ( coord<=-kCarTolerance*0.5 ) |
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| 97 | { |
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| 98 | in = kInside; |
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| 99 | } |
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| 100 | else if ( coord<=kCarTolerance*0.5 ) |
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| 101 | { |
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| 102 | in = kSurface; |
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| 103 | } |
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| 104 | break; |
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| 105 | case kPhi: |
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| 106 | if ( localPoint.y()||localPoint.x() ) |
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| 107 | { |
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| 108 | coord = std::fabs(std::atan2(localPoint.y(),localPoint.x()))-width*0.5; |
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| 109 | if ( coord<=-kAngTolerance*0.5 ) |
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| 110 | { |
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| 111 | in = kInside; |
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| 112 | } |
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| 113 | else if ( coord<=kAngTolerance*0.5 ) |
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| 114 | { |
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| 115 | in = kSurface; |
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| 116 | } |
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| 117 | } |
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| 118 | else |
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| 119 | { |
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| 120 | in = kSurface; |
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| 121 | } |
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| 122 | break; |
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| 123 | case kRho: |
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| 124 | rad2 = localPoint.perp2(); |
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| 125 | rmax = (replicaNo+1)*width+offset; |
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| 126 | tolRMax2 = rmax-kRadTolerance*0.5; |
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| 127 | tolRMax2 *= tolRMax2; |
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| 128 | if ( rad2>tolRMax2 ) |
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| 129 | { |
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| 130 | tolRMax2 = rmax+kRadTolerance*0.5; |
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| 131 | tolRMax2 *= tolRMax2; |
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| 132 | if ( rad2<=tolRMax2 ) |
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| 133 | { |
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| 134 | in = kSurface; |
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| 135 | } |
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| 136 | } |
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| 137 | else |
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| 138 | { |
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| 139 | // Known to be inside outer radius |
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| 140 | // |
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| 141 | if ( replicaNo||offset ) |
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| 142 | { |
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| 143 | rmin = rmax-width; |
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| 144 | tolRMin2 = rmin-kRadTolerance*0.5; |
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| 145 | tolRMin2 *= tolRMin2; |
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| 146 | if ( rad2>tolRMin2 ) |
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| 147 | { |
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| 148 | tolRMin2 = rmin+kRadTolerance*0.5; |
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| 149 | tolRMin2 *= tolRMin2; |
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| 150 | if ( rad2>=tolRMin2 ) |
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| 151 | { |
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| 152 | in = kInside; |
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| 153 | } |
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| 154 | else |
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| 155 | { |
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| 156 | in = kSurface; |
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| 157 | } |
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| 158 | } |
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| 159 | } |
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| 160 | else |
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| 161 | { |
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| 162 | in = kInside; |
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| 163 | } |
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| 164 | } |
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| 165 | break; |
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| 166 | default: |
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| 167 | G4Exception("G4ReplicaNavigation::Inside()", "WrongArgumentValue", |
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| 168 | FatalException, "Unknown axis!"); |
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| 169 | break; |
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| 170 | } |
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| 171 | return in; |
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| 172 | } |
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| 173 | |
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| 174 | // ******************************************************************** |
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| 175 | // DistanceToOut |
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| 176 | // ******************************************************************** |
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| 177 | // |
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| 178 | G4double |
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| 179 | G4ReplicaNavigation::DistanceToOut(const G4VPhysicalVolume *pVol, |
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| 180 | const G4int replicaNo, |
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| 181 | const G4ThreeVector &localPoint) const |
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| 182 | { |
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| 183 | // Replication data |
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| 184 | // |
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| 185 | EAxis axis; |
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| 186 | G4int nReplicas; |
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| 187 | G4double width,offset; |
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| 188 | G4bool consuming; |
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| 189 | |
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| 190 | G4double safety=0.; |
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| 191 | G4double safe1,safe2; |
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| 192 | G4double coord, rho, rmin, rmax; |
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| 193 | |
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| 194 | pVol->GetReplicationData(axis, nReplicas, width, offset, consuming); |
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| 195 | assert(consuming); |
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| 196 | switch(axis) |
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| 197 | { |
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| 198 | case kXAxis: |
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| 199 | case kYAxis: |
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| 200 | case kZAxis: |
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| 201 | coord = localPoint(axis); |
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| 202 | safe1 = width*0.5-coord; |
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| 203 | safe2 = width*0.5+coord; |
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| 204 | safety = (safe1<=safe2) ? safe1 : safe2; |
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| 205 | break; |
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| 206 | case kPhi: |
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| 207 | if ( localPoint.y()<=0 ) |
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| 208 | { |
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| 209 | safety = localPoint.x()*std::sin(width*0.5) |
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| 210 | + localPoint.y()*std::cos(width*0.5); |
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| 211 | } |
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| 212 | else |
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| 213 | { |
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| 214 | safety = localPoint.x()*std::sin(width*0.5) |
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| 215 | - localPoint.y()*std::cos(width*0.5); |
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| 216 | } |
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| 217 | break; |
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| 218 | case kRho: |
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| 219 | rho = localPoint.perp(); |
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| 220 | rmax = width*(replicaNo+1)+offset; |
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| 221 | if ( replicaNo||offset ) |
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| 222 | { |
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| 223 | rmin = rmax-width; |
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| 224 | safe1 = rho-rmin; |
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| 225 | safe2 = rmax-rho; |
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| 226 | safety = (safe1<=safe2) ? safe1 : safe2; |
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| 227 | } |
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| 228 | else |
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| 229 | { |
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| 230 | safety = rmax-rho; |
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| 231 | } |
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| 232 | break; |
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| 233 | default: |
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| 234 | G4Exception("G4ReplicaNavigation::DistanceToOut()", "WrongArgumentValue", |
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| 235 | FatalException, "Unknown axis!"); |
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| 236 | break; |
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| 237 | } |
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| 238 | return (safety >= kCarTolerance) ? safety : 0; |
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| 239 | } |
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| 240 | |
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| 241 | // ******************************************************************** |
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| 242 | // DistanceToOut |
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| 243 | // ******************************************************************** |
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| 244 | // |
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| 245 | G4double |
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| 246 | G4ReplicaNavigation::DistanceToOut(const G4VPhysicalVolume *pVol, |
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| 247 | const G4int replicaNo, |
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| 248 | const G4ThreeVector &localPoint, |
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| 249 | const G4ThreeVector &localDirection) const |
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| 250 | { |
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| 251 | // Replication data |
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| 252 | // |
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| 253 | EAxis axis; |
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| 254 | G4int nReplicas; |
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| 255 | G4double width, offset; |
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| 256 | G4bool consuming; |
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| 257 | |
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| 258 | G4double Dist=kInfinity; |
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| 259 | G4double coord, Comp, lindist; |
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| 260 | |
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| 261 | pVol->GetReplicationData(axis, nReplicas, width, offset, consuming); |
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| 262 | assert(consuming); |
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| 263 | switch(axis) |
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| 264 | { |
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| 265 | case kXAxis: |
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| 266 | case kYAxis: |
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| 267 | case kZAxis: |
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| 268 | coord = localPoint(axis); |
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| 269 | Comp = localDirection(axis); |
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| 270 | if ( Comp>0 ) |
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| 271 | { |
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| 272 | lindist = width*0.5-coord; |
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| 273 | Dist = (lindist>0) ? lindist/Comp : 0; |
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| 274 | } |
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| 275 | else if ( Comp<0 ) |
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| 276 | { |
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| 277 | lindist = width*0.5+coord; |
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| 278 | Dist = (lindist>0) ? -lindist/Comp : 0; |
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| 279 | } |
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| 280 | else |
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| 281 | { |
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| 282 | Dist = kInfinity; |
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| 283 | } |
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| 284 | break; |
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| 285 | case kPhi: |
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| 286 | Dist = DistanceToOutPhi(localPoint, localDirection, width); |
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| 287 | break; |
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| 288 | case kRho: |
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| 289 | Dist=DistanceToOutRad(localPoint,localDirection,width,offset,replicaNo); |
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| 290 | break; |
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| 291 | default: |
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| 292 | G4Exception("G4ReplicaNavigation::DistanceToOut()", "WrongArgumentValue", |
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| 293 | FatalException, "Unknown axis!"); |
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| 294 | break; |
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| 295 | } |
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| 296 | return Dist; |
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| 297 | } |
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| 298 | |
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| 299 | // ******************************************************************** |
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| 300 | // DistanceToOutPhi |
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| 301 | // ******************************************************************** |
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| 302 | // |
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| 303 | G4double |
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| 304 | G4ReplicaNavigation::DistanceToOutPhi(const G4ThreeVector &localPoint, |
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| 305 | const G4ThreeVector &localDirection, |
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| 306 | const G4double width) const |
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| 307 | { |
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| 308 | // Phi Intersection |
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| 309 | // NOTE: width<=pi by definition |
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| 310 | // |
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| 311 | G4double sinSPhi, cosSPhi; |
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| 312 | G4double pDistS, pDistE, compS, compE, Dist, dist2, yi; |
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| 313 | if ( localPoint.x()||localPoint.y() ) |
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| 314 | { |
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| 315 | sinSPhi = std::sin(-width*0.5); // SIN of starting phi plane |
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| 316 | cosSPhi = std::cos(width*0.5); // COS of starting phi plane |
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| 317 | |
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| 318 | // pDist -ve when inside |
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| 319 | // |
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| 320 | pDistS = localPoint.x()*sinSPhi-localPoint.y()*cosSPhi; |
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| 321 | pDistE = localPoint.x()*sinSPhi+localPoint.y()*cosSPhi; |
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| 322 | |
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| 323 | // Comp -ve when in direction of outwards normal |
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| 324 | // |
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| 325 | compS = -sinSPhi*localDirection.x()+cosSPhi*localDirection.y(); |
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| 326 | compE = -sinSPhi*localDirection.x()-cosSPhi*localDirection.y(); |
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| 327 | |
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| 328 | if ( (pDistS<=0)&&(pDistE<=0) ) |
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| 329 | { |
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| 330 | // Inside both phi *full* planes |
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| 331 | // |
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| 332 | if ( compS<0 ) |
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| 333 | { |
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| 334 | dist2 = pDistS/compS; |
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| 335 | yi = localPoint.y()+dist2*localDirection.y(); |
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| 336 | |
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| 337 | // Check intersecting with correct half-plane (no -> no intersect) |
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| 338 | // |
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| 339 | if ( yi<=0 ) |
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| 340 | { |
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| 341 | Dist = (pDistS<=-kCarTolerance*0.5) ? dist2 : 0; |
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| 342 | } |
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| 343 | else |
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| 344 | { |
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| 345 | Dist = kInfinity; |
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| 346 | } |
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| 347 | } |
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| 348 | else |
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| 349 | { |
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| 350 | Dist = kInfinity; |
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| 351 | } |
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| 352 | if ( compE<0 ) |
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| 353 | { |
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| 354 | dist2 = pDistE/compE; |
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| 355 | |
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| 356 | // Only check further if < starting phi intersection |
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| 357 | // |
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| 358 | if ( dist2<Dist ) |
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| 359 | { |
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| 360 | yi = localPoint.y()+dist2*localDirection.y(); |
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| 361 | |
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| 362 | // Check intersecting with correct half-plane |
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| 363 | // |
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| 364 | if ( yi>=0 ) |
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| 365 | { |
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| 366 | // Leaving via ending phi |
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| 367 | // |
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| 368 | Dist = (pDistE<=-kCarTolerance*0.5) ? dist2 : 0; |
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| 369 | } |
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| 370 | } |
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| 371 | } |
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| 372 | } |
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| 373 | else if ( (pDistS>=0)&&(pDistE>=0) ) |
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| 374 | { |
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| 375 | // Outside both *full* phi planes |
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| 376 | // if towards both >=0 then once inside will remain inside |
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| 377 | // |
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| 378 | Dist = ((compS>=0)&&(compE>=0)) ? kInfinity : 0; |
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| 379 | } |
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| 380 | else if ( (pDistS>0)&&(pDistE<0) ) |
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| 381 | { |
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| 382 | // Outside full starting plane, inside full ending plane |
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| 383 | // |
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| 384 | if ( compE<0 ) |
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| 385 | { |
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| 386 | dist2 = pDistE/compE; |
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| 387 | yi = localPoint.y()+dist2*localDirection.y(); |
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| 388 | |
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| 389 | // Check intersection in correct half-plane |
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| 390 | // (if not -> remain in extent) |
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| 391 | // |
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| 392 | Dist = (yi>0) ? dist2 : kInfinity; |
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| 393 | } |
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| 394 | else // Leaving immediately by starting phi |
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| 395 | { |
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| 396 | Dist = kInfinity; |
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| 397 | } |
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| 398 | } |
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| 399 | else |
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| 400 | { |
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| 401 | // Must be (pDistS<0)&&(pDistE>0) |
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| 402 | // Inside full starting plane, outside full ending plane |
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| 403 | // |
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| 404 | if ( compE>=0 ) |
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| 405 | { |
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| 406 | if ( compS<0 ) |
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| 407 | { |
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| 408 | dist2 = pDistS/compS; |
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| 409 | yi = localPoint.y()+dist2*localDirection.y(); |
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| 410 | |
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| 411 | // Check intersection in correct half-plane |
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| 412 | // (if not -> remain in extent) |
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| 413 | // |
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| 414 | Dist = (yi<0) ? dist2 : kInfinity; |
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| 415 | } |
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| 416 | else |
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| 417 | { |
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| 418 | Dist = kInfinity; |
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| 419 | } |
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| 420 | } |
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| 421 | else |
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| 422 | { |
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| 423 | // Leaving immediately by ending phi |
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| 424 | // |
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| 425 | Dist = 0; |
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| 426 | } |
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| 427 | } |
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| 428 | } |
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| 429 | else |
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| 430 | { |
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| 431 | // On z axis + travel not || to z axis -> use direction vector |
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| 432 | // |
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| 433 | Dist = (std::fabs(localDirection.phi())<=width*0.5) ? kInfinity : 0; |
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| 434 | } |
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| 435 | return Dist; |
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| 436 | } |
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| 437 | |
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| 438 | // ******************************************************************** |
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| 439 | // DistanceToOutRad |
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| 440 | // ******************************************************************** |
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| 441 | // |
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| 442 | G4double |
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| 443 | G4ReplicaNavigation::DistanceToOutRad(const G4ThreeVector &localPoint, |
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| 444 | const G4ThreeVector &localDirection, |
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| 445 | const G4double width, |
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| 446 | const G4double offset, |
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| 447 | const G4int replicaNo) const |
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| 448 | { |
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| 449 | G4double rmin, rmax, t1, t2, t3, deltaR; |
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| 450 | G4double b, c, d2, sr; |
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| 451 | |
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| 452 | // |
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| 453 | // Radial Intersections |
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| 454 | // |
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| 455 | |
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| 456 | // Find intersction with cylinders at rmax/rmin |
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| 457 | // Intersection point (xi,yi,zi) on line |
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| 458 | // x=localPoint.x+t*localDirection.x etc. |
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| 459 | // |
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| 460 | // Intersects with x^2+y^2=R^2 |
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| 461 | // |
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| 462 | // Hence (localDirection.x^2+localDirection.y^2)t^2+ |
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| 463 | // 2t(localPoint.x*localDirection.x+localPoint.y*localDirection.y)+ |
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| 464 | // localPoint.x^2+localPoint.y^2-R^2=0 |
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| 465 | // |
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| 466 | // t1 t2 t3 |
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| 467 | |
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| 468 | rmin = replicaNo*width+offset; |
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| 469 | rmax = (replicaNo+1)*width+offset; |
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| 470 | |
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| 471 | t1 = 1.0-localDirection.z()*localDirection.z(); // since v normalised |
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| 472 | t2 = localPoint.x()*localDirection.x()+localPoint.y()*localDirection.y(); |
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| 473 | t3 = localPoint.x()*localPoint.x()+localPoint.y()*localPoint.y(); |
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| 474 | |
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| 475 | if ( t1>0 ) // Check not parallel |
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| 476 | { |
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| 477 | // Calculate sr, r exit distance |
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| 478 | // |
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| 479 | if ( t2>=0 ) |
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| 480 | { |
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| 481 | // Delta r not negative => leaving via rmax |
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| 482 | // |
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| 483 | deltaR = t3-rmax*rmax; |
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| 484 | |
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| 485 | // NOTE: Should use |
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| 486 | // rho-rmax<-kRadTolerance*0.5 - [no sqrts for efficiency] |
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| 487 | // |
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| 488 | if ( deltaR<-kRadTolerance*0.5 ) |
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| 489 | { |
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| 490 | b = t2/t1; |
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| 491 | c = deltaR/t1; |
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| 492 | sr = -b+std::sqrt(b*b-c); |
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| 493 | } |
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| 494 | else |
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| 495 | { |
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| 496 | // On tolerant boundary & heading outwards (or locally |
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| 497 | // perpendicular to) outer radial surface -> leaving immediately |
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| 498 | // |
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| 499 | sr = 0; |
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| 500 | } |
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| 501 | } |
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| 502 | else |
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| 503 | { |
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| 504 | // Possible rmin intersection |
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| 505 | // |
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| 506 | if (rmin) |
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| 507 | { |
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| 508 | deltaR = t3-rmin*rmin; |
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| 509 | b = t2/t1; |
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| 510 | c = deltaR/t1; |
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| 511 | d2 = b*b-c; |
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| 512 | if ( d2>=0 ) |
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| 513 | { |
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| 514 | // Leaving via rmin |
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| 515 | // NOTE: Should use |
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| 516 | // rho-rmin>kRadTolerance*0.5 - [no sqrts for efficiency] |
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| 517 | // |
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| 518 | sr = (deltaR>kRadTolerance*0.5) ? -b-std::sqrt(d2) : 0; |
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| 519 | } |
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| 520 | else |
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| 521 | { |
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| 522 | // No rmin intersect -> must be rmax intersect |
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| 523 | // |
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| 524 | deltaR = t3-rmax*rmax; |
---|
| 525 | c = deltaR/t1; |
---|
| 526 | sr = -b+std::sqrt(b*b-c); |
---|
| 527 | } |
---|
| 528 | } |
---|
| 529 | else |
---|
| 530 | { |
---|
| 531 | // No rmin intersect -> must be rmax intersect |
---|
| 532 | // |
---|
| 533 | deltaR = t3-rmax*rmax; |
---|
| 534 | b = t2/t1; |
---|
| 535 | c = deltaR/t1; |
---|
| 536 | sr = -b+std::sqrt(b*b-c); |
---|
| 537 | } |
---|
| 538 | } |
---|
| 539 | } |
---|
| 540 | else |
---|
| 541 | { |
---|
| 542 | sr=kInfinity; |
---|
| 543 | } |
---|
| 544 | return sr; |
---|
| 545 | } |
---|
| 546 | |
---|
| 547 | // ******************************************************************** |
---|
| 548 | // ComputeTransformation |
---|
| 549 | // |
---|
| 550 | // Setup transformation and transform point into local system |
---|
| 551 | // ******************************************************************** |
---|
| 552 | // |
---|
| 553 | void |
---|
| 554 | G4ReplicaNavigation::ComputeTransformation(const G4int replicaNo, |
---|
| 555 | G4VPhysicalVolume* pVol, |
---|
| 556 | G4ThreeVector& point) const |
---|
| 557 | { |
---|
| 558 | G4double val,cosv,sinv,tmpx,tmpy; |
---|
| 559 | |
---|
| 560 | // Replication data |
---|
| 561 | // |
---|
| 562 | EAxis axis; |
---|
| 563 | G4int nReplicas; |
---|
| 564 | G4double width,offset; |
---|
| 565 | G4bool consuming; |
---|
| 566 | |
---|
| 567 | pVol->GetReplicationData(axis, nReplicas, width, offset, consuming); |
---|
| 568 | assert(consuming); |
---|
| 569 | |
---|
| 570 | switch (axis) |
---|
| 571 | { |
---|
| 572 | case kXAxis: |
---|
| 573 | val = -width*0.5*(nReplicas-1)+width*replicaNo; |
---|
| 574 | pVol->SetTranslation(G4ThreeVector(val,0,0)); |
---|
| 575 | point.setX(point.x()-val); |
---|
| 576 | break; |
---|
| 577 | case kYAxis: |
---|
| 578 | val = -width*0.5*(nReplicas-1)+width*replicaNo; |
---|
| 579 | pVol->SetTranslation(G4ThreeVector(0,val,0)); |
---|
| 580 | point.setY(point.y()-val); |
---|
| 581 | break; |
---|
| 582 | case kZAxis: |
---|
| 583 | val = -width*0.5*(nReplicas-1)+width*replicaNo; |
---|
| 584 | pVol->SetTranslation(G4ThreeVector(0,0,val)); |
---|
| 585 | point.setZ(point.z()-val); |
---|
| 586 | break; |
---|
| 587 | case kPhi: |
---|
| 588 | val = -(offset+width*(replicaNo+0.5)); |
---|
| 589 | SetPhiTransformation(val,pVol); |
---|
| 590 | cosv = std::cos(val); |
---|
| 591 | sinv = std::sin(val); |
---|
| 592 | tmpx = point.x()*cosv-point.y()*sinv; |
---|
| 593 | tmpy = point.x()*sinv+point.y()*cosv; |
---|
| 594 | point.setY(tmpy); |
---|
| 595 | point.setX(tmpx); |
---|
| 596 | break; |
---|
| 597 | case kRho: |
---|
| 598 | // No setup required for radial case |
---|
| 599 | default: |
---|
| 600 | break; |
---|
| 601 | } |
---|
| 602 | } |
---|
| 603 | |
---|
| 604 | // ******************************************************************** |
---|
| 605 | // ComputeTransformation |
---|
| 606 | // |
---|
| 607 | // Setup transformation into local system |
---|
| 608 | // ******************************************************************** |
---|
| 609 | // |
---|
| 610 | void |
---|
| 611 | G4ReplicaNavigation::ComputeTransformation(const G4int replicaNo, |
---|
| 612 | G4VPhysicalVolume* pVol) const |
---|
| 613 | { |
---|
| 614 | G4double val; |
---|
| 615 | |
---|
| 616 | // Replication data |
---|
| 617 | // |
---|
| 618 | EAxis axis; |
---|
| 619 | G4int nReplicas; |
---|
| 620 | G4double width, offset; |
---|
| 621 | G4bool consuming; |
---|
| 622 | |
---|
| 623 | pVol->GetReplicationData(axis, nReplicas, width, offset, consuming); |
---|
| 624 | assert(consuming); |
---|
| 625 | |
---|
| 626 | switch (axis) |
---|
| 627 | { |
---|
| 628 | case kXAxis: |
---|
| 629 | val = -width*0.5*(nReplicas-1)+width*replicaNo; |
---|
| 630 | pVol->SetTranslation(G4ThreeVector(val,0,0)); |
---|
| 631 | break; |
---|
| 632 | case kYAxis: |
---|
| 633 | val = -width*0.5*(nReplicas-1)+width*replicaNo; |
---|
| 634 | pVol->SetTranslation(G4ThreeVector(0,val,0)); |
---|
| 635 | break; |
---|
| 636 | case kZAxis: |
---|
| 637 | val = -width*0.5*(nReplicas-1)+width*replicaNo; |
---|
| 638 | pVol->SetTranslation(G4ThreeVector(0,0,val)); |
---|
| 639 | break; |
---|
| 640 | case kPhi: |
---|
| 641 | val = -(offset+width*(replicaNo+0.5)); |
---|
| 642 | SetPhiTransformation(val,pVol); |
---|
| 643 | break; |
---|
| 644 | case kRho: |
---|
| 645 | // No setup required for radial case |
---|
| 646 | default: |
---|
| 647 | break; |
---|
| 648 | } |
---|
| 649 | } |
---|
| 650 | |
---|
| 651 | // ******************************************************************** |
---|
| 652 | // ComputeStep |
---|
| 653 | // ******************************************************************** |
---|
| 654 | // |
---|
| 655 | G4double |
---|
| 656 | G4ReplicaNavigation::ComputeStep(const G4ThreeVector &globalPoint, |
---|
| 657 | const G4ThreeVector &globalDirection, |
---|
| 658 | const G4ThreeVector &localPoint, |
---|
| 659 | const G4ThreeVector &localDirection, |
---|
| 660 | const G4double currentProposedStepLength, |
---|
| 661 | G4double &newSafety, |
---|
| 662 | G4NavigationHistory &history, |
---|
| 663 | G4bool &validExitNormal, |
---|
| 664 | G4ThreeVector &exitNormal, |
---|
| 665 | G4bool &exiting, |
---|
| 666 | G4bool &entering, |
---|
| 667 | G4VPhysicalVolume *(*pBlockedPhysical), |
---|
| 668 | G4int &blockedReplicaNo ) |
---|
| 669 | { |
---|
| 670 | G4VPhysicalVolume *repPhysical, *motherPhysical; |
---|
| 671 | G4VPhysicalVolume *samplePhysical, *blockedExitedVol=0; |
---|
| 672 | G4LogicalVolume *repLogical; |
---|
| 673 | G4VSolid *motherSolid; |
---|
| 674 | G4ThreeVector repPoint, repDirection, sampleDirection; |
---|
| 675 | G4double ourStep=currentProposedStepLength; |
---|
| 676 | G4double ourSafety=kInfinity; |
---|
| 677 | G4double sampleStep, sampleSafety, motherStep, motherSafety; |
---|
| 678 | G4int localNoDaughters, sampleNo; |
---|
| 679 | G4int depth; |
---|
| 680 | |
---|
| 681 | // Exiting normal optimisation |
---|
| 682 | // |
---|
| 683 | if ( exiting&&validExitNormal ) |
---|
| 684 | { |
---|
| 685 | if ( localDirection.dot(exitNormal)>=kMinExitingNormalCosine ) |
---|
| 686 | { |
---|
| 687 | // Block exited daughter volume |
---|
| 688 | // |
---|
| 689 | blockedExitedVol = *pBlockedPhysical; |
---|
| 690 | ourSafety = 0; |
---|
| 691 | } |
---|
| 692 | } |
---|
| 693 | exiting = false; |
---|
| 694 | entering = false; |
---|
| 695 | |
---|
| 696 | repPhysical = history.GetTopVolume(); |
---|
| 697 | repLogical = repPhysical->GetLogicalVolume(); |
---|
| 698 | |
---|
| 699 | // |
---|
| 700 | // Compute intersection with replica boundaries & replica safety |
---|
| 701 | // |
---|
| 702 | |
---|
| 703 | sampleSafety = DistanceToOut(repPhysical, |
---|
| 704 | history.GetTopReplicaNo(), |
---|
| 705 | localPoint); |
---|
| 706 | |
---|
| 707 | if ( sampleSafety<ourSafety ) |
---|
| 708 | { |
---|
| 709 | ourSafety = sampleSafety; |
---|
| 710 | } |
---|
| 711 | if ( sampleSafety<ourStep ) |
---|
| 712 | { |
---|
| 713 | sampleStep = DistanceToOut(repPhysical, |
---|
| 714 | history.GetTopReplicaNo(), |
---|
| 715 | localPoint, |
---|
| 716 | localDirection); |
---|
| 717 | if ( sampleStep<ourStep ) |
---|
| 718 | { |
---|
| 719 | ourStep = sampleStep; |
---|
| 720 | exiting = true; |
---|
| 721 | validExitNormal = false; |
---|
| 722 | } |
---|
| 723 | } |
---|
| 724 | |
---|
| 725 | depth = history.GetDepth()-1; |
---|
| 726 | while ( history.GetVolumeType(depth)==kReplica ) |
---|
| 727 | { |
---|
| 728 | repPoint = history.GetTransform(depth).TransformPoint(globalPoint); |
---|
| 729 | sampleSafety = DistanceToOut(history.GetVolume(depth), |
---|
| 730 | history.GetReplicaNo(depth), |
---|
| 731 | repPoint); |
---|
| 732 | if ( sampleSafety<ourSafety ) |
---|
| 733 | { |
---|
| 734 | ourSafety = sampleSafety; |
---|
| 735 | } |
---|
| 736 | if ( sampleSafety<ourStep ) |
---|
| 737 | { |
---|
| 738 | sampleStep = DistanceToOut(history.GetVolume(depth), |
---|
| 739 | history.GetReplicaNo(depth), |
---|
| 740 | repPoint, |
---|
| 741 | history.GetTransform(depth).TransformAxis(globalDirection)); |
---|
| 742 | if ( sampleStep<ourStep ) |
---|
| 743 | { |
---|
| 744 | ourStep = sampleStep; |
---|
| 745 | exiting = true; |
---|
| 746 | validExitNormal = false; |
---|
| 747 | } |
---|
| 748 | } |
---|
| 749 | depth--; |
---|
| 750 | } |
---|
| 751 | |
---|
| 752 | // Compute mother safety & intersection |
---|
| 753 | // |
---|
| 754 | repPoint = history.GetTransform(depth).TransformPoint(globalPoint); |
---|
| 755 | motherPhysical = history.GetVolume(depth); |
---|
| 756 | motherSolid = motherPhysical->GetLogicalVolume()->GetSolid(); |
---|
| 757 | motherSafety = motherSolid->DistanceToOut(repPoint); |
---|
| 758 | repDirection = history.GetTransform(depth).TransformAxis(globalDirection); |
---|
| 759 | motherStep = motherSolid->DistanceToOut(repPoint,repDirection,true, |
---|
| 760 | &validExitNormal,&exitNormal); |
---|
| 761 | |
---|
| 762 | // Push in principle no longer necessary. G4Navigator now takes care of ... |
---|
| 763 | // Removing this will however generate warnings for pushed particles from |
---|
| 764 | // G4Navigator, particularly for the case of 3D replicas (Cartesian or |
---|
| 765 | // combined Radial/Phi cases). |
---|
| 766 | // Requires further investigation and eventually reimplementation of |
---|
| 767 | // LevelLocate() to take into account point and direction ... |
---|
| 768 | // |
---|
| 769 | if ( ( !ourStep && (sampleSafety<0.5*kCarTolerance) ) |
---|
| 770 | && ( repLogical->GetSolid()->Inside(localPoint)==kSurface ) ) |
---|
| 771 | { |
---|
| 772 | ourStep += kCarTolerance; |
---|
| 773 | } |
---|
| 774 | |
---|
| 775 | if ( motherSafety<ourSafety ) |
---|
| 776 | { |
---|
| 777 | ourSafety = motherSafety; |
---|
| 778 | } |
---|
| 779 | |
---|
| 780 | #ifdef G4VERBOSE |
---|
| 781 | if ( fCheck ) |
---|
| 782 | { |
---|
| 783 | if( motherSolid->Inside(localPoint)==kOutside ) |
---|
| 784 | { |
---|
| 785 | G4cout << "WARNING - G4ReplicaNavigation::ComputeStep()" << G4endl |
---|
| 786 | << " Point " << localPoint |
---|
| 787 | << " is outside current volume " << motherPhysical->GetName() |
---|
| 788 | << G4endl; |
---|
| 789 | G4double estDistToSolid= motherSolid->DistanceToIn(localPoint); |
---|
| 790 | G4cout << " Estimated isotropic distance to solid (distToIn)= " |
---|
| 791 | << estDistToSolid << G4endl; |
---|
| 792 | if( estDistToSolid > 100.0 * kCarTolerance ) |
---|
| 793 | { |
---|
| 794 | motherSolid->DumpInfo(); |
---|
| 795 | G4Exception("G4ReplicaNavigation::ComputeStep()", |
---|
| 796 | "FarOutsideCurrentVolume", FatalException, |
---|
| 797 | "Point is far outside Current Volume !" ); |
---|
| 798 | } |
---|
| 799 | else |
---|
| 800 | G4Exception("G4ReplicaNavigation::ComputeStep()", |
---|
| 801 | "OutsideCurrentVolume", JustWarning, |
---|
| 802 | "Point is a little outside Current Volume."); |
---|
| 803 | } |
---|
| 804 | } |
---|
| 805 | #endif |
---|
| 806 | |
---|
| 807 | // May need precision protection |
---|
| 808 | // |
---|
| 809 | if ( motherSafety<=ourStep ) |
---|
| 810 | { |
---|
| 811 | if ( motherStep<=ourStep ) |
---|
| 812 | { |
---|
| 813 | ourStep = motherStep; |
---|
| 814 | exiting = true; |
---|
| 815 | if ( validExitNormal ) |
---|
| 816 | { |
---|
| 817 | const G4RotationMatrix* rot = motherPhysical->GetRotation(); |
---|
| 818 | if ( rot ) |
---|
| 819 | { |
---|
| 820 | exitNormal *= rot->inverse(); |
---|
| 821 | } |
---|
| 822 | } |
---|
| 823 | } |
---|
| 824 | else |
---|
| 825 | { |
---|
| 826 | validExitNormal = false; |
---|
| 827 | } |
---|
| 828 | } |
---|
| 829 | // |
---|
| 830 | // Compute daughter safeties & intersections |
---|
| 831 | // |
---|
| 832 | localNoDaughters = repLogical->GetNoDaughters(); |
---|
| 833 | for ( sampleNo=localNoDaughters-1; sampleNo>=0; sampleNo-- ) |
---|
| 834 | { |
---|
| 835 | samplePhysical = repLogical->GetDaughter(sampleNo); |
---|
| 836 | if ( samplePhysical!=blockedExitedVol ) |
---|
| 837 | { |
---|
| 838 | G4AffineTransform sampleTf(samplePhysical->GetRotation(), |
---|
| 839 | samplePhysical->GetTranslation()); |
---|
| 840 | sampleTf.Invert(); |
---|
| 841 | const G4ThreeVector samplePoint = |
---|
| 842 | sampleTf.TransformPoint(localPoint); |
---|
| 843 | const G4VSolid* sampleSolid = |
---|
| 844 | samplePhysical->GetLogicalVolume()->GetSolid(); |
---|
| 845 | const G4double sampleSafetyDistance = |
---|
| 846 | sampleSolid->DistanceToIn(samplePoint); |
---|
| 847 | if ( sampleSafetyDistance<ourSafety ) |
---|
| 848 | { |
---|
| 849 | ourSafety = sampleSafetyDistance; |
---|
| 850 | } |
---|
| 851 | if ( sampleSafetyDistance<=ourStep ) |
---|
| 852 | { |
---|
| 853 | sampleDirection = sampleTf.TransformAxis(localDirection); |
---|
| 854 | const G4double sampleStepDistance = |
---|
| 855 | sampleSolid->DistanceToIn(samplePoint,sampleDirection); |
---|
| 856 | if ( sampleStepDistance<=ourStep ) |
---|
| 857 | { |
---|
| 858 | ourStep = sampleStepDistance; |
---|
| 859 | entering = true; |
---|
| 860 | exiting = false; |
---|
| 861 | *pBlockedPhysical = samplePhysical; |
---|
| 862 | blockedReplicaNo = -1; |
---|
| 863 | #ifdef G4VERBOSE |
---|
| 864 | // Check to see that the resulting point is indeed in/on volume. |
---|
| 865 | // This check could eventually be made only for successful candidate. |
---|
| 866 | |
---|
| 867 | if ( ( fCheck ) && ( sampleStepDistance < kInfinity ) ) |
---|
| 868 | { |
---|
| 869 | G4ThreeVector intersectionPoint; |
---|
| 870 | intersectionPoint= samplePoint |
---|
| 871 | + sampleStepDistance * sampleDirection; |
---|
| 872 | EInside insideIntPt= sampleSolid->Inside(intersectionPoint); |
---|
| 873 | if ( insideIntPt != kSurface ) |
---|
| 874 | { |
---|
| 875 | G4int oldcoutPrec = G4cout.precision(16); |
---|
| 876 | G4cout << "WARNING - G4ReplicaNavigation::ComputeStep()" |
---|
| 877 | << G4endl |
---|
| 878 | << " Inaccurate DistanceToIn for solid " |
---|
| 879 | << sampleSolid->GetName() << G4endl; |
---|
| 880 | G4cout << " Solid gave DistanceToIn = " |
---|
| 881 | << sampleStepDistance << " yet returns " ; |
---|
| 882 | if ( insideIntPt == kInside ) |
---|
| 883 | G4cout << "-kInside-"; |
---|
| 884 | else if ( insideIntPt == kOutside ) |
---|
| 885 | G4cout << "-kOutside-"; |
---|
| 886 | else |
---|
| 887 | G4cout << "-kSurface-"; |
---|
| 888 | G4cout << " for this point !" << G4endl; |
---|
| 889 | G4cout << " Point = " << intersectionPoint << G4endl; |
---|
| 890 | if ( insideIntPt != kInside ) |
---|
| 891 | G4cout << " DistanceToIn(p) = " |
---|
| 892 | << sampleSolid->DistanceToIn(intersectionPoint) |
---|
| 893 | << G4endl; |
---|
| 894 | if ( insideIntPt != kOutside ) |
---|
| 895 | G4cout << " DistanceToOut(p) = " |
---|
| 896 | << sampleSolid->DistanceToOut(intersectionPoint) |
---|
| 897 | << G4endl; |
---|
| 898 | G4Exception("G4ReplicaNavigation::ComputeStep()", |
---|
| 899 | "InaccurateDistanceToIn", JustWarning, |
---|
| 900 | "Navigator gets conflicting response from Solid."); |
---|
| 901 | G4cout.precision(oldcoutPrec); |
---|
| 902 | } |
---|
| 903 | } |
---|
| 904 | #endif |
---|
| 905 | } |
---|
| 906 | } |
---|
| 907 | } |
---|
| 908 | } |
---|
| 909 | newSafety = ourSafety; |
---|
| 910 | return ourStep; |
---|
| 911 | } |
---|
| 912 | |
---|
| 913 | // ******************************************************************** |
---|
| 914 | // ComputeSafety |
---|
| 915 | // |
---|
| 916 | // Compute the isotropic distance to current volume's boundaries |
---|
| 917 | // and to daughter volumes. |
---|
| 918 | // ******************************************************************** |
---|
| 919 | // |
---|
| 920 | G4double |
---|
| 921 | G4ReplicaNavigation::ComputeSafety(const G4ThreeVector &globalPoint, |
---|
| 922 | const G4ThreeVector &localPoint, |
---|
| 923 | G4NavigationHistory &history, |
---|
| 924 | const G4double ) |
---|
| 925 | { |
---|
| 926 | G4VPhysicalVolume *repPhysical, *motherPhysical; |
---|
| 927 | G4VPhysicalVolume *samplePhysical, *blockedExitedVol=0; |
---|
| 928 | G4LogicalVolume *repLogical; |
---|
| 929 | G4VSolid *motherSolid; |
---|
| 930 | G4ThreeVector repPoint; |
---|
| 931 | G4double ourSafety=kInfinity; |
---|
| 932 | G4double sampleSafety; |
---|
| 933 | G4int localNoDaughters, sampleNo; |
---|
| 934 | G4int depth; |
---|
| 935 | |
---|
| 936 | repPhysical = history.GetTopVolume(); |
---|
| 937 | repLogical = repPhysical->GetLogicalVolume(); |
---|
| 938 | |
---|
| 939 | // |
---|
| 940 | // Compute intersection with replica boundaries & replica safety |
---|
| 941 | // |
---|
| 942 | |
---|
| 943 | sampleSafety = DistanceToOut(history.GetTopVolume(), |
---|
| 944 | history.GetTopReplicaNo(), |
---|
| 945 | localPoint); |
---|
| 946 | if ( sampleSafety<ourSafety ) |
---|
| 947 | { |
---|
| 948 | ourSafety = sampleSafety; |
---|
| 949 | } |
---|
| 950 | |
---|
| 951 | depth = history.GetDepth()-1; |
---|
| 952 | while ( history.GetVolumeType(depth)==kReplica ) |
---|
| 953 | { |
---|
| 954 | repPoint = history.GetTransform(depth).TransformPoint(globalPoint); |
---|
| 955 | sampleSafety = DistanceToOut(history.GetVolume(depth), |
---|
| 956 | history.GetReplicaNo(depth), |
---|
| 957 | repPoint); |
---|
| 958 | if ( sampleSafety<ourSafety ) |
---|
| 959 | { |
---|
| 960 | ourSafety = sampleSafety; |
---|
| 961 | } |
---|
| 962 | depth--; |
---|
| 963 | } |
---|
| 964 | |
---|
| 965 | // Compute mother safety & intersection |
---|
| 966 | // |
---|
| 967 | repPoint = history.GetTransform(depth).TransformPoint(globalPoint); |
---|
| 968 | motherPhysical = history.GetVolume(depth); |
---|
| 969 | motherSolid = motherPhysical->GetLogicalVolume()->GetSolid(); |
---|
| 970 | sampleSafety = motherSolid->DistanceToOut(repPoint); |
---|
| 971 | |
---|
| 972 | if ( sampleSafety<ourSafety ) |
---|
| 973 | { |
---|
| 974 | ourSafety = sampleSafety; |
---|
| 975 | } |
---|
| 976 | |
---|
| 977 | // Compute daughter safeties & intersections |
---|
| 978 | // |
---|
| 979 | localNoDaughters = repLogical->GetNoDaughters(); |
---|
| 980 | for ( sampleNo=localNoDaughters-1; sampleNo>=0; sampleNo-- ) |
---|
| 981 | { |
---|
| 982 | samplePhysical = repLogical->GetDaughter(sampleNo); |
---|
| 983 | if ( samplePhysical!=blockedExitedVol ) |
---|
| 984 | { |
---|
| 985 | G4AffineTransform sampleTf(samplePhysical->GetRotation(), |
---|
| 986 | samplePhysical->GetTranslation()); |
---|
| 987 | sampleTf.Invert(); |
---|
| 988 | const G4ThreeVector samplePoint = |
---|
| 989 | sampleTf.TransformPoint(localPoint); |
---|
| 990 | const G4VSolid *sampleSolid = |
---|
| 991 | samplePhysical->GetLogicalVolume()->GetSolid(); |
---|
| 992 | const G4double sampleSafetyDistance = |
---|
| 993 | sampleSolid->DistanceToIn(samplePoint); |
---|
| 994 | if ( sampleSafetyDistance<ourSafety ) |
---|
| 995 | { |
---|
| 996 | ourSafety = sampleSafetyDistance; |
---|
| 997 | } |
---|
| 998 | } |
---|
| 999 | } |
---|
| 1000 | return ourSafety; |
---|
| 1001 | } |
---|
| 1002 | |
---|
| 1003 | // ******************************************************************** |
---|
| 1004 | // BackLocate |
---|
| 1005 | // ******************************************************************** |
---|
| 1006 | // |
---|
| 1007 | EInside |
---|
| 1008 | G4ReplicaNavigation::BackLocate(G4NavigationHistory &history, |
---|
| 1009 | const G4ThreeVector &globalPoint, |
---|
| 1010 | G4ThreeVector &localPoint, |
---|
| 1011 | const G4bool &exiting, |
---|
| 1012 | G4bool ¬KnownInside ) const |
---|
| 1013 | { |
---|
| 1014 | G4VPhysicalVolume *pNRMother=0; |
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| 1015 | G4VSolid *motherSolid; |
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| 1016 | G4ThreeVector repPoint, goodPoint; |
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| 1017 | G4int mdepth, depth, cdepth; |
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| 1018 | EInside insideCode; |
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| 1019 | |
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| 1020 | cdepth = history.GetDepth(); |
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| 1021 | |
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| 1022 | // Find non replicated mother |
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| 1023 | // |
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| 1024 | for ( mdepth=cdepth-1; mdepth>=0; mdepth-- ) |
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| 1025 | { |
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| 1026 | if ( history.GetVolumeType(mdepth)!=kReplica ) |
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| 1027 | { |
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| 1028 | pNRMother = history.GetVolume(mdepth); |
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| 1029 | break; |
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| 1030 | } |
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| 1031 | } |
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| 1032 | |
---|
| 1033 | if( pNRMother==0 ) |
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| 1034 | { |
---|
| 1035 | // All the tree of mother volumes were Replicas. |
---|
| 1036 | // This is an error, as the World volume must be a Placement |
---|
| 1037 | // |
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| 1038 | G4cerr << "The World volume must be a Placement!" << G4endl; |
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| 1039 | G4Exception("G4ReplicaNavigation::BackLocate()", "InvalidSetup", |
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| 1040 | FatalException, "The World volume must be a Placement!"); |
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| 1041 | } |
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| 1042 | |
---|
| 1043 | motherSolid = pNRMother->GetLogicalVolume()->GetSolid(); |
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| 1044 | goodPoint = history.GetTransform(mdepth).TransformPoint(globalPoint); |
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| 1045 | insideCode = motherSolid->Inside(goodPoint); |
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| 1046 | if ( (insideCode==kOutside)||((insideCode==kSurface)&&exiting) ) |
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| 1047 | { |
---|
| 1048 | // Outside mother -> back up to mother level |
---|
| 1049 | // Locate.. in Navigator will back up one more level |
---|
| 1050 | // localPoint not required |
---|
| 1051 | // |
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| 1052 | history.BackLevel(cdepth-mdepth); |
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| 1053 | // localPoint = goodPoint; |
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| 1054 | } |
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| 1055 | else |
---|
| 1056 | { |
---|
| 1057 | notKnownInside = false; |
---|
| 1058 | |
---|
| 1059 | // Still within replications |
---|
| 1060 | // Check down: if on outside stop at this level |
---|
| 1061 | // |
---|
| 1062 | for ( depth=mdepth+1; depth<cdepth; depth++) |
---|
| 1063 | { |
---|
| 1064 | repPoint = history.GetTransform(depth).TransformPoint(globalPoint); |
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| 1065 | insideCode = Inside(history.GetVolume(depth), |
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| 1066 | history.GetReplicaNo(depth), |
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| 1067 | repPoint); |
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| 1068 | if ( (insideCode==kOutside)||((insideCode==kSurface)&&exiting) ) |
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| 1069 | { |
---|
| 1070 | localPoint = goodPoint; |
---|
| 1071 | history.BackLevel(cdepth-depth); |
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| 1072 | return insideCode; |
---|
| 1073 | } |
---|
| 1074 | else |
---|
| 1075 | { |
---|
| 1076 | goodPoint = repPoint; |
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| 1077 | } |
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| 1078 | } |
---|
| 1079 | localPoint = history.GetTransform(depth).TransformPoint(globalPoint); |
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| 1080 | insideCode = Inside(history.GetVolume(depth), |
---|
| 1081 | history.GetReplicaNo(depth), |
---|
| 1082 | localPoint); |
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| 1083 | // If outside level, set localPoint = coordinates in reference system |
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| 1084 | // of *previous* level - location code in navigator will back up one |
---|
| 1085 | // level [And also manage blocking] |
---|
| 1086 | // |
---|
| 1087 | if ( (insideCode==kOutside)||((insideCode==kSurface)&&exiting) ) |
---|
| 1088 | { |
---|
| 1089 | localPoint = goodPoint; |
---|
| 1090 | } |
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| 1091 | } |
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| 1092 | return insideCode; |
---|
| 1093 | } |
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